The polls history of underestimating GOP vote

 Robert Romano:

In 2010, 2012, 2014, 2016, 2018, and 2020, national opinion polls failed to capture the magnitude of Republican enthusiasm on the generic Congressional ballot by 3.1 percentage points, an analysis of the average of national polls by RealClearPolitics.com shows.
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In 2016, polls had Democrats up on the generic Congressional ballot by 0.6 percent, but they lost the House of Representatives elections’ popular vote 49.1 percent to 48 percent, a 1.1 percent margin, with 128.6 million votes cast in the House elections. They also almost entirely had Hillary Clinton defeating Donald Trump easily in the presidential election. Still, instead, Trump pulled out narrow wins in Pennsylvania, Michigan, and Wisconsin to secure the Electoral College.

Republicans were underrepresented by 3.7 percentage points. They were only supposed to get 45.4 percent.

In 2020, polls had Democrats easily winning the House by 6.8 percentage points, 49.3 percent to 42.5 percent, but instead only won by 3.1 percentage points, 50.8 percent to 47.7 percent, as Republicans actually picked up 14 seats that year.

Republicans were under-polled by 5.6 percentage points that year. They were only supposed to get 42.5 percent.
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You get the picture. Whatever the polls say towards the end of the month into November, you might want to take it with a grain of salt, which tends to undersample both Republican and Democratic support.

In fact, Democrats were underrepresented in each of the polls’ averages as well, owing to undecideds in the poll. Still, there appear to be much greater misses on the GOP side of the equation, where Republicans were underrepresented by 3.1 points on average versus 2.5 points for Democrats. The biggest miss for Democrats was in 2018 when they were under-polled by 3.6 points. Republicans’ biggest miss was 5.8 points in 2014.

Trafalgar Group pollster Robert Cahaly, one of the only pollsters to have the presidential race for Trump in 2016, said there are “submerged voters” in September, writing on Twitter, “I call this new group ‘submerged voters’. They aren’t putting stickers on their cars, signs in their yards, posting their opinions, or even answering polls. At this point, I think it’s fair to say that Biden’s pursuit of and attacks on ‘MAGA Republicans’ has created an army of voters who will be virtually impossible to poll (even for us) and more difficult still to estimate. The 2022 Republican turnout will likely be higher than any of the polls or models are showing. All polls (including ours) will understate the impact of these ‘submerged voters.’”
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It has been a while since I have been polled.  But make no mistake, I can't wait to vote against Democrats.